FDA-Approved Peptides: The Complete List and What…

The peptide therapy conversation often glosses over a critical distinction: many of the most effective peptides are actually FDA-approved prescription drugs with robust clinical trial data behind them. Understanding which peptides have full regulatory approval — and for what indications — is essential whether you're a patient, a clinician, or someone navigating the gray market of research compounds.

This guide provides a comprehensive, categorized list of FDA-approved peptide drugs, their approved indications, and how they fit into the broader landscape of peptide therapy.

Why FDA Approval Matters

FDA approval means a peptide drug has passed Phase I, II, and III clinical trials demonstrating safety and efficacy for a specific indication. It means manufacturing standards are enforced, dosing is validated, and adverse effects have been systematically catalogued. It does not mean the drug is safe for all uses, nor does it prevent off-label prescribing by physicians once approval is granted.

Many patients use compounded versions of FDA-approved peptides (like semaglutide or tesamorelin) at lower cost. Compounding is legal when done by licensed 503A or 503B pharmacies, but the compounded product itself is not FDA-approved.

Metabolic and Weight Management Peptides

Semaglutide (Ozempic, Wegovy, Rybelsus)

A GLP-1 receptor agonist that mimics the incretin hormone glucagon-like peptide 1. FDA-approved for:

Type 2 diabetes management (Ozempic, injectable; Rybelsus, oral)
Chronic weight management in adults with BMI ≥30 or ≥27 with weight-related comorbidity (Wegovy)
Cardiovascular risk reduction in adults with Type 2 diabetes and established CV disease (Ozempic)

Semaglutide represents one of the most significant advances in metabolic medicine in decades. Phase III STEP trials showed 15–17% average body weight reduction. See our GLP-1 peptides guide for more.

Tirzepatide (Mounjaro, Zepbound)

A dual GIP/GLP-1 receptor agonist. FDA-approved for:

Type 2 diabetes (Mounjaro)
Chronic weight management (Zepbound)

SURMOUNT trials showed up to 22% body weight reduction — the highest of any approved obesity pharmacotherapy to date.

Liraglutide (Victoza, Saxenda)

An older GLP-1 agonist. Approved for Type 2 diabetes (Victoza) and weight management (Saxenda). Less potent than semaglutide for weight loss but established with a longer safety record.

Pramlintide (Symlin)

A synthetic analog of amylin, approved as an adjunct to insulin in Type 1 and Type 2 diabetes. Slows gastric emptying and suppresses glucagon.

Growth Hormone and Related Peptides

Tesamorelin (Egrifta SV)

A growth hormone-releasing hormone (GHRH) analog. FDA-approved specifically for:

Reduction of excess abdominal fat in HIV-infected patients with lipodystrophy

Tesamorelin is the only FDA-approved GHRH analog. Off-label, it is widely used for age-related GH decline and body composition. It's one of the most studied compounds in the peptide therapy space. Full guide: tesamorelin peptide guide.

Sermorelin (Geref — discontinued brand; widely compounded)

Sermorelin was originally FDA-approved as a diagnostic agent for GH deficiency. The original brand has been discontinued, but sermorelin is widely compounded legally for anti-aging and GH support purposes. Technically, the compounded product is prescribed off-label as the drug itself is no longer an active FDA-approved product.

Mecasermin (Increlex)

Recombinant IGF-1 (insulin-like growth factor 1). FDA-approved for severe primary IGF-1 deficiency or GH gene deletion.

Sexual Health Peptides

Bremelanotide / PT-141 (Vyleesi)

A melanocortin receptor agonist. FDA-approved for:

Hypoactive sexual desire disorder (HSDD) in premenopausal women

This is the only FDA-approved non-hormonal treatment for female sexual dysfunction. It works centrally via the brain rather than through the vascular mechanism of PDE5 inhibitors used in men. Off-label use in men has shown efficacy but is not approved.

Bone and Musculoskeletal Peptides

Teriparatide (Forteo)

A fragment of parathyroid hormone (PTH 1-34). FDA-approved for:

Osteoporosis in postmenopausal women at high fracture risk
Primary or hypogonadal osteoporosis in men
Glucocorticoid-induced osteoporosis

Teriparatide is anabolic for bone — it stimulates new bone formation rather than just slowing resorption.

Abaloparatide (Tymlos)

A synthetic analog of PTHrP (parathyroid hormone-related protein). FDA-approved for postmenopausal osteoporosis with high fracture risk. Similar mechanism to teriparatide.

Romosozumab (Evenity)

A monoclonal antibody targeting sclerostin (a peptide that inhibits bone formation). FDA-approved for postmenopausal osteoporosis. Dual mechanism: increases bone formation and decreases resorption.

Cardiovascular and Kidney Peptides

Carperitide / Nesiritide (Natrecor)

B-type natriuretic peptide (BNP). Nesiritide is FDA-approved for acutely decompensated heart failure to reduce dyspnea.

Eptifibatide (Integrilin)

A cyclic peptide inhibitor of platelet aggregation. FDA-approved for acute coronary syndromes and PCI (percutaneous coronary intervention).

Ziconotide (Prialt)

Derived from a cone snail venom peptide. FDA-approved for severe chronic pain via intrathecal administration. Blocks N-type calcium channels.

Reproductive and Hormonal Peptides

Leuprolide (Lupron), Goserelin (Zoladex), Buserelin, Triptorelin

GnRH (gonadotropin-releasing hormone) agonist analogs. FDA-approved for:

Prostate cancer (hormone suppression)
Endometriosis
Uterine fibroids
Central precocious puberty
Assisted reproduction protocols

GnRH analogs work paradoxically — chronic administration suppresses LH and FSH through receptor downregulation, effectively shutting down sex hormone production.

Cetrorelix (Cetrotide), Ganirelix (Antagon)

GnRH antagonists. FDA-approved for controlled ovarian stimulation in assisted reproduction.

Oxytocin (Pitocin)

The body's own bonding and labor hormone — a 9-amino-acid peptide. FDA-approved for labor induction, augmentation of labor, and management of postpartum bleeding.

Insulin: The Original Therapeutic Peptide

Insulin itself is a peptide (51 amino acids). FDA-approved for all forms of diabetes requiring insulin therapy. Modern insulin analogs (lispro, aspart, glargine, detemir, degludec) are engineered peptide variants with modified pharmacokinetics.

Antimicrobial Peptides

Dalbavancin (Dalvance), Oritavancin (Orbactiv)

Lipoglycopeptide antibiotics (technically glycopeptides, not classic AMPs). FDA-approved for acute bacterial skin infections including MRSA.

Colistin (Polymyxin E)

A polymyxin peptide antibiotic. FDA-approved for Gram-negative bacterial infections, particularly drug-resistant strains.

Oncology Peptides

Romidepsin (Istodax)

A bicyclic peptide HDAC inhibitor. FDA-approved for cutaneous T-cell lymphoma.

Octreotide (Sandostatin)

A somatostatin analog. FDA-approved for acromegaly, carcinoid syndrome, and VIPomas. Widely studied for its anti-proliferative and GH-suppressing effects.

Lanreotide (Somatuline)

Another somatostatin analog. FDA-approved for acromegaly and gastroenteropancreatic neuroendocrine tumors.

Immune and Inflammatory Peptides

Thymalfasin / Thymosin Alpha-1 (Zadaxin)

Not FDA-approved in the US but approved in over 35 countries for hepatitis B, hepatitis C, and as an immune adjuvant in cancer. Widely used in functional medicine contexts.

LL-37 (Cathelicidin fragment)

Not FDA-approved as a drug but under investigation. See our LL-37 peptide guide.

Peptides Currently in the Regulatory Gray Area

Many widely used peptides are not FDA-approved but are commonly prescribed off-label or used as research chemicals:

BPC-157 — no FDA approval; extensive animal data; frequently compounded
TB-500 — no FDA approval; derived from Thymosin Beta-4 research
Epithalon — no FDA approval; Russian research origins
MOTS-c — preclinical stage
GHK-Cu — approved as cosmetic ingredient; not as injectable drug

The FDA's position on compounded BPC-157 has shifted — see our full discussion in peptide therapy complete guide 2026.

Frequently Asked Questions

Q: Can a doctor legally prescribe non-FDA-approved peptides? Yes. Physicians can prescribe drugs off-label in the US, including peptides that were previously approved (like sermorelin) or that are compounded from approved bulk substances. The legal question is more about the compounding pharmacy's compliance than the prescription itself.

Q: Is semaglutide a peptide? Yes. Semaglutide is a 31-amino acid peptide analog of GLP-1 with modifications that extend its half-life. It is one of the most commercially successful peptide drugs ever approved.

Q: Why isn't BPC-157 FDA-approved despite widespread use? FDA approval requires a sponsor to fund and conduct multi-phase clinical trials, which costs hundreds of millions of dollars. BPC-157 is not patentable in its natural form, so there is no financial incentive for a pharmaceutical company to fund the trials. This doesn't mean it's ineffective — it means the regulatory pathway hasn't been pursued.

Q: Are FDA-approved peptides covered by insurance? FDA-approved peptides used for their approved indications typically are covered, though coverage depends on your plan and diagnosis. Off-label use is rarely covered. See our cost breakdown for details.

Q: What's the difference between an FDA-approved peptide and a compounded version? The FDA-approved version has been manufactured to validated standards and tested in clinical trials. A compounded version from a licensed pharmacy is legal but is not itself FDA-reviewed. Quality varies between compounders — 503B outsourcing facilities have stricter standards than 503A patient-specific pharmacies.